<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="vue.js"></script>

</head>

<body>
  <div id="app">
    <h3>{{msg}}</h3>
    <input :type=[inputType] v-model="msg">

    <h4 :style="{color:c,fontWeight:wight}">1212</h4>

  </div>

  <script>
    var vm = new Vue({
      el: '#app',
      data: {
        msg: "hello!",
        c: 'red',
        wight: '400',
        inputType: "number"
      },
      methods: {

      }
    })
  </script>
</body>

</html>